package thread;

public class SyncDemo {
    public static void main(String[] args) {
        Table table = new Table();
        Thread t1 = new Thread() {
            public void run() {
                while (true) {
                    int bean = table.getBean();//从桌子上拿一个豆子
                    Thread.yield();
                    System.out.println(getName() + ":" + bean);
                }
            }

        };
            Thread t2 = new Thread() {
                public void run() {
                    while (true) {
                        int bean = table.getBean();//从桌子上拿一个豆子
                        Thread.yield();
                        System.out.println(getName() + ":" + bean);
                    }
                }
            };
        t1.start();
        t2.start();
    }
}
class  Table{
    private int beans = 20;
    public synchronized int getBean(){
        if (beans==0){
            throw new RuntimeException("没有豆子了！");
        }
        Thread.yield();
        return beans--;
    }
}